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With a simple touch, YubiKey protects access to computers, networks, and online services for everyone from individual consumers to the world’s largest organizations. YubiKey 4 Nano is a small USB device supporting multiple authentication and cryptographic protocols. YubiKey 4 Nano works on Microsoft Windows, Mac OS X, and Linux operating systems, and on major browsers. Works instantly with no need to re-type passcodes – replacing SMS texts, authenticator apps, RSA tokens, and similar devices